BCD-to-Seven-Segment Decoder/Driver
HD74LS48
BCD-to-Seven-Segment Decoder / Driver (Internal Pull-up outputs)
REJ03D0411–0300 Rev.3.00
Jul.22.2005
HD74LS4...
Description
HD74LS48
BCD-to-Seven-Segment Decoder / Driver (Internal Pull-up outputs)
REJ03D0411–0300 Rev.3.00
Jul.22.2005
HD74LS48 features active high outputs for driving lamp buffers. This circuit has full ripple blanking input / output controls and a lamp test input. Display patterns for BCD input counts above 9 are unique symbols to authenticate input conditions. This circuit incorporates automatic leading and / or trailing-edge zero-blanking control (RBI and RBO). Lamp test (LT) of these types may be performed at any time when the BI / RBO node is at a high level. It contains an overriding blanking input (BI) which can be used to control the lamp intensity be pulsing or to inhibit the outputs. Inputs and outputs are entirely compatible for use with TTL or DTL logic outputs.
Features
Ordering Information
Part Name HD74LS48P
Package Type DILP-16 pin
Package Code (Previous Code)
PRDP0016AE-B (DP-16FV)
Package Abbreviation
P
Taping Abbreviation (Quantity)
—
Pin Arrangement
B Inputs
C
Lamp Test
BI/RBO
1 2 3 4
RBI 5
D6 Inputs
A7
GND 8
B C LT BI/RBO RBI D A
f g a b c d e
16 VCC 15 f 14 g 13 a 12 b Outputs 11 c 10 d 9e
(Top view)
Rev.3.00, Jul.22.2005, page 1 of 6
HD74LS48
Function Table
Decimal or
Inputs
BI /
Outputs
Function LT RBI D C B A RBO a
b
c
d
e
f
Note g
0
H H LLLL
H
HHHHHH L
1
H X LLLH
H
LHHL L L L
2
H X LLHL
H
HHLHHL H
3
H X L LHH
H
HHHHL L H
4
H X LHLL
H
LHHL LHH
5
H X LHLH
H
H L HH L HH
6
H X LHHL
H
L LHHHHH
7
H ...
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